CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions	Mar. 31, 2018	Sep. 30, 2017	Mar. 31, 2017
ASSETS
Utility Plant	$ 5,403.4	$ 5,278.4	$ 4,978.8
Less: Accumulated depreciation and amortization	1,645.0	1,613.2	1,585.9
Net Utility Plant	3,758.4	3,665.2	3,392.9
Non-utility Property (net of accumulated depreciation and amortization of $9.1, $8.6 and $7.8 at March 31, 2018, September 30, 2017, and March 31, 2017, respectively)	116.9	52.0	26.6
Goodwill	1,171.6	1,171.6	1,163.9
Other Investments	66.4	64.2	63.2
Total Other Property and Investments	1,354.9	1,287.8	1,253.7
Current Assets:
Cash and cash equivalents	17.8	7.4	19.6
Accounts receivable:
Utility	302.4	140.5	238.5
Other	111.3	149.2	127.9
Allowance for doubtful accounts	(25.7)	(18.3)	(20.8)
Delayed customer billings	45.6	3.4	11.6
Inventories:
Natural gas	94.3	194.9	117.6
Propane gas	12.0	12.0	12.0
Materials and supplies	22.2	18.9	16.8
Natural gas receivable	3.0	1.9	7.8
Derivative instrument assets	7.3	5.9	8.2
Unamortized purchased gas adjustments	32.6	102.6	61.0
Other regulatory assets	65.1	72.9	64.8
Prepayments and other	30.4	34.2	19.3
Total Current Assets	718.3	725.5	684.3
Deferred Charges:
Regulatory assets	673.6	791.1	827.7
Other	81.6	77.1	98.1
Total Deferred Charges	755.2	868.2	925.8
Total Assets	6,586.8	6,546.7	6,256.7
Capitalization:
Common stock (par value $1.00 per share; 70.0 million shares authorized; 48.4 million, 48.3 million and 45.7 million shares issued and outstanding at March 31, 2018, September 30, 2017 and March 31, 2017, respectively)	48.4	48.3	45.7
Paid-in capital	1,327.3	1,325.6	1,177.7
Retained earnings	773.7	614.2	655.9
Accumulated other comprehensive income	4.1	3.2	3.7
Total Equity	2,153.5	1,991.3	1,883.0
Redeemable noncontrolling interest	6.5	0.0	0.0
Long-term debt (less current portion)	2,073.9	1,995.0	1,925.3
Total Capitalization	4,233.9	3,986.3	3,808.3
Current Liabilities:
Current portion of long-term debt	105.5	100.0	0.0
Notes payable	391.7	477.3	567.4
Accounts payable	194.8	257.1	218.6
Advance customer billings	8.1	32.0	14.5
Wages and compensation accrued	30.0	38.7	29.0
Dividends payable	28.3	26.6	24.9
Customer deposits	36.1	34.9	35.7
Interest accrued	15.8	14.6	15.3
Taxes accrued	49.1	61.0	46.7
Unamortized purchased gas adjustments	1.5	1.0	1.6
Other regulatory liabilities	20.7	21.6	29.7
Other	46.4	33.1	31.9
Total Current Liabilities	928.0	1,097.9	1,015.3
Deferred Credits and Other Liabilities:
Deferred income taxes	465.6	707.5	690.6
Pension and postretirement benefit costs	233.4	237.4	308.1
Asset retirement obligations	302.8	296.6	212.4
Regulatory liabilities	353.1	157.2	144.1
Other	70.0	63.8	77.9
Total Deferred Credits and Other Liabilities	1,424.9	1,462.5	1,433.1
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	6,586.8	6,546.7	6,256.7
Spire Missouri
ASSETS
Utility Plant	3,163.8	3,091.8	2,855.0
Less: Accumulated depreciation and amortization	687.2	681.6	659.6
Net Utility Plant	2,476.6	2,410.2	2,195.4
Goodwill	210.2	210.2	210.2
Other Investments	59.0	59.4	58.3
Total Other Property and Investments	269.2	269.6	268.5
Current Assets:
Cash and cash equivalents	10.2	2.5	3.7
Accounts receivable:
Utility	222.4	101.7	166.4
Associated companies	1.3	3.3	22.7
Other	26.0	15.0	12.0
Allowance for doubtful accounts	(20.7)	(14.1)	(16.5)
Delayed customer billings	45.6	3.4	11.6
Inventories:
Natural gas	60.0	138.2	75.8
Propane gas	12.0	12.0	12.0
Materials and supplies	13.1	11.3	9.9
Derivative instrument assets	0.0	0.1	2.9
Unamortized purchased gas adjustments	13.5	57.4	17.1
Other regulatory assets	38.2	38.2	38.2
Prepayments and other	10.7	19.6	10.5
Total Current Assets	432.3	388.6	366.3
Deferred Charges:
Regulatory assets	446.6	557.8	569.4
Other	9.0	5.3	2.6
Total Deferred Charges	455.6	563.1	572.0
Total Assets	3,633.7	3,631.5	3,402.2
Capitalization:
Paid-in capital and common stock	758.4	756.2	753.9
Retained earnings	517.3	416.5	398.6
Accumulated other comprehensive income	(1.8)	(1.7)	(1.8)
Total Equity	1,273.9	1,171.0	1,150.7
Long-term debt (less current portion)	874.0	873.9	804.3
Total Capitalization	2,147.9	2,044.9	1,955.0
Current Liabilities:
Current portion of long-term debt	100.0	100.0	0.0
Notes payable – associated companies	175.8	203.0	282.2
Accounts payable	69.2	89.9	57.8
Accounts payable – associated companies	3.6	5.4	5.1
Advance customer billings	0.0	13.3	0.2
Wages and compensation accrued	23.4	29.6	21.8
Dividends payable	13.5	0.0	0.0
Customer deposits	13.2	13.3	13.1
Interest accrued	8.2	8.0	7.9
Taxes accrued	25.2	34.1	23.8
Other regulatory liabilities	2.7	2.7	2.7
Other	19.4	8.5	8.7
Total Current Liabilities	454.2	507.8	423.3
Deferred Credits and Other Liabilities:
Deferred income taxes	388.6	623.8	607.7
Pension and postretirement benefit costs	161.9	173.0	213.5
Asset retirement obligations	161.9	158.6	77.0
Regulatory liabilities	272.5	81.2	84.5
Other	46.7	42.2	41.2
Total Deferred Credits and Other Liabilities	1,031.6	1,078.8	1,023.9
Commitments and Contingencies (Note 10)
Total Capitalization and Liabilities	3,633.7	3,631.5	3,402.2
Spire Alabama
ASSETS
Utility Plant	1,885.4	1,838.0	1,776.1
Less: Accumulated depreciation and amortization	803.9	782.0	779.1
Net Utility Plant	1,081.5	1,056.0	997.0
Current Assets:
Cash and cash equivalents	0.0	0.1	0.0
Accounts receivable:
Utility	64.1	32.0	62.0
Associated companies	0.1	0.0	0.4
Other	6.4	6.2	5.7
Allowance for doubtful accounts	(2.7)	(2.6)	(2.3)
Inventories:
Natural gas	26.2	33.9	26.5
Materials and supplies	7.8	6.5	5.8
Unamortized purchased gas adjustments	19.0	45.2	43.9
Other regulatory assets	13.1	19.4	11.2
Prepayments and other	5.6	6.7	4.1
Total Current Assets	139.6	147.4	157.3
Deferred Charges:
Regulatory assets	198.9	197.0	229.3
Deferred income taxes	100.3	185.6	186.2
Other	57.9	57.0	62.0
Total Deferred Charges	357.1	439.6	477.5
Total Assets	1,578.2	1,643.0	1,631.8
Capitalization:
Paid-in capital and common stock	390.9	420.9	420.9
Retained earnings	437.5	446.5	462.8
Total Equity	828.4	867.4	883.7
Long-term debt (less current portion)	322.5	247.8	247.7
Total Capitalization	1,150.9	1,115.2	1,131.4
Current Liabilities:
Notes payable – associated companies	82.3	169.9	109.3
Accounts payable	42.9	44.4	42.8
Accounts payable – associated companies	1.5	1.6	1.5
Advance customer billings	7.9	18.6	14.3
Wages and compensation accrued	5.3	7.4	5.2
Customer deposits	19.0	17.9	18.9
Interest accrued	4.1	3.3	3.4
Taxes accrued	21.9	23.4	16.9
Other regulatory liabilities	10.8	12.0	25.1
Other	2.4	2.9	4.8
Total Current Liabilities	198.1	301.4	242.2
Deferred Credits and Other Liabilities:
Pension and postretirement benefit costs	55.3	50.2	76.6
Asset retirement obligations	131.1	128.4	124.1
Regulatory liabilities	35.0	39.6	35.9
Other	7.8	8.2	21.6
Total Deferred Credits and Other Liabilities	229.2	226.4	258.2
Total Capitalization and Liabilities	$ 1,578.2	$ 1,643.0	$ 1,631.8